CD          =    drag coefficient           =    0.40

   ρ           =    density of air             =    1.23  kg/m^3

   A           =   cross section area of ball  =    0.00426  m^2

   v           =   velocity of ball   (m/s)
Q: What is the size and direction of this force on a fastball travelling at 90 mph?

Q: Which is larger in size: gravitational or drag force?